This is the foundation for a really good puzzle game. Very good implementation of the '3' theme!
The art could use a face lift. but is perfectly fine for a game jam submission.
The sound is a little generic, but it works well enough.
The character movement could, perhaps, be a little smoother, but it doesn't really hurt the game at all.
I didn't get too far into the game, but what I did play showed some solid puzzle design.
With a little more polish, new objects to interact with, and maybe some touchscreen support, I could see this being a pretty popular game. Very impressive prototype!
